Display panel or portion thereof with graphical user interface



FIG. 1 is a front-view of a display panel or portion thereof with graphical user interface in a first embodiment showing our new design; and,

FIG. 2 is a front-view thereof in a second embodiment.

The outermost broken line rectangle showing a display panel or portion thereof as well as all other broken lines showing portions of the graphical user interface in the drawing figures form no part of the claimed design. 

CLAIM The ornamental design for a display panel or portion thereof with graphical user interface, as shown and described. 